Fatal error: Uncaught Error: Undefined constant "isu_date" in /home2/pphmj/public_html/article.php:444
Stack trace:
#0 /home2/pphmj/public_html/article.php(23): art_abstract_show(NULL)
#1 {main}
thrown in /home2/pphmj/public_html/article.php on line 444